Title:
A tube with a branch pipe, buffers, and these manufacturing methods
Document Type and Number:
Japanese Patent JP6108876
Kind Code:
B2
Abstract:
A shock absorber includes a cylinder sealingly containing oil, and a piston coupled with a piston rod and inserted in the cylinder. The shock absorber generates a damping force by controlling an oil flow generated according to a movement of the piston with use of a damping force generation mechanism. A separator tube is externally disposed around the cylinder. The oil is transmitted into the damping force generation mechanism via a branch tube integrally formed on a cylindrical sidewall of the separator tube. The branch tube is formed on the cylindrical sidewall of the separator tube by burring processing. Both sides of a proximal portion of the branch tube in a circumferential direction of the cylindrical sidewall of the separator tube are pressed from an interior to concave an inner circumferential surface radially outwardly, thereby forming recesses.
Inventors:
Makoto Nishimura
Takayuki Ohno
Takayuki Ohno
Application Number:
JP2013039558A
Publication Date:
April 05, 2017
Filing Date:
February 28, 2013
Export Citation:
Assignee:
Hitachi Automotive Systems, Ltd.
International Classes:
B21D51/16; B21D19/08; B21D53/88; F16F9/32
Domestic Patent References:
| JP11159563A | ||||
| JP7047430A | ||||
| JP60216931A | ||||
| JP2192826A | ||||
| JP7039947A | ||||
| JP11267745A |
Foreign References:
| US5353898 |
Attorney, Agent or Firm:
Calyx